[tip:locking/core 19/21] include/linux/atomic/atomic-instrumented.h:476:16: sparse: sparse: cast truncates bits from constant value (ffffffffaaa31337 becomes 37)

From: kernel test robot
Date: Tue Aug 03 2021 - 10:31:43 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking/core
head: cf3ee3c8c29dc349b2cf52e5e72e8cb805ff5e57
commit: e3d18cee258b898017b298b5b93f8134dd62aee3 [19/21] locking/atomic: centralize generated headers
config: ia64-randconfig-s032-20210803 (attached as .config)
compiler: ia64-linux-gcc (GCC) 10.3.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.3-341-g8af24329-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=e3d18cee258b898017b298b5b93f8134dd62aee3
git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
git fetch --no-tags tip locking/core
git checkout e3d18cee258b898017b298b5b93f8134dd62aee3
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=ia64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>


sparse warnings: (new ones prefixed by >>)
lib/atomic64_test.c: note: in included file (through include/linux/atomic.h):
>> include/linux/atomic/atomic-instrumented.h:476:16: sparse: sparse: cast truncates bits from constant value (ffffffffaaa31337 becomes 37)
include/linux/atomic/atomic-instrumented.h:476:16: sparse: sparse: cast truncates bits from constant value (ffffffffaaa31337 becomes 1337)
include/linux/atomic/atomic-instrumented.h:483:16: sparse: sparse: cast truncates bits from constant value (ffffffffaaa31337 becomes 37)
include/linux/atomic/atomic-instrumented.h:483:16: sparse: sparse: cast truncates bits from constant value (ffffffffaaa31337 becomes 1337)
include/linux/atomic/atomic-instrumented.h:490:16: sparse: sparse: cast truncates bits from constant value (ffffffffaaa31337 becomes 37)
include/linux/atomic/atomic-instrumented.h:490:16: sparse: sparse: cast truncates bits from constant value (ffffffffaaa31337 becomes 1337)
include/linux/atomic/atomic-instrumented.h:497:16: sparse: sparse: cast truncates bits from constant value (ffffffffaaa31337 becomes 37)
include/linux/atomic/atomic-instrumented.h:497:16: sparse: sparse: cast truncates bits from constant value (ffffffffaaa31337 becomes 1337)
>> include/linux/atomic/atomic-instrumented.h:476:16: sparse: sparse: cast truncates bits from constant value (11112222 becomes 22)
include/linux/atomic/atomic-instrumented.h:476:16: sparse: sparse: cast truncates bits from constant value (11112222 becomes 2222)
include/linux/atomic/atomic-instrumented.h:483:16: sparse: sparse: cast truncates bits from constant value (11112222 becomes 22)
include/linux/atomic/atomic-instrumented.h:483:16: sparse: sparse: cast truncates bits from constant value (11112222 becomes 2222)
include/linux/atomic/atomic-instrumented.h:490:16: sparse: sparse: cast truncates bits from constant value (11112222 becomes 22)
include/linux/atomic/atomic-instrumented.h:490:16: sparse: sparse: cast truncates bits from constant value (11112222 becomes 2222)
include/linux/atomic/atomic-instrumented.h:497:16: sparse: sparse: cast truncates bits from constant value (11112222 becomes 22)
include/linux/atomic/atomic-instrumented.h:497:16: sparse: sparse: cast truncates bits from constant value (11112222 becomes 2222)
>> include/linux/atomic/atomic-instrumented.h:1054:16: sparse: sparse: cast truncates bits from constant value (aaa31337c001d00d becomes d)
>> include/linux/atomic/atomic-instrumented.h:1054:16: sparse: sparse: cast truncates bits from constant value (aaa31337c001d00d becomes d00d)
>> include/linux/atomic/atomic-instrumented.h:1054:16: sparse: sparse: cast truncates bits from constant value (aaa31337c001d00d becomes c001d00d)
include/linux/atomic/atomic-instrumented.h:1061:16: sparse: sparse: cast truncates bits from constant value (aaa31337c001d00d becomes d)
include/linux/atomic/atomic-instrumented.h:1061:16: sparse: sparse: cast truncates bits from constant value (aaa31337c001d00d becomes d00d)
include/linux/atomic/atomic-instrumented.h:1061:16: sparse: sparse: cast truncates bits from constant value (aaa31337c001d00d becomes c001d00d)
include/linux/atomic/atomic-instrumented.h:1068:16: sparse: sparse: cast truncates bits from constant value (aaa31337c001d00d becomes d)
include/linux/atomic/atomic-instrumented.h:1068:16: sparse: sparse: cast truncates bits from constant value (aaa31337c001d00d becomes d00d)
include/linux/atomic/atomic-instrumented.h:1068:16: sparse: sparse: cast truncates bits from constant value (aaa31337c001d00d becomes c001d00d)
include/linux/atomic/atomic-instrumented.h:1075:16: sparse: sparse: cast truncates bits from constant value (aaa31337c001d00d becomes d)
include/linux/atomic/atomic-instrumented.h:1075:16: sparse: sparse: cast truncates bits from constant value (aaa31337c001d00d becomes d00d)
include/linux/atomic/atomic-instrumented.h:1075:16: sparse: sparse: cast truncates bits from constant value (aaa31337c001d00d becomes c001d00d)
>> include/linux/atomic/atomic-instrumented.h:1054:16: sparse: sparse: cast truncates bits from constant value (faceabadf00df001 becomes 1)
>> include/linux/atomic/atomic-instrumented.h:1054:16: sparse: sparse: cast truncates bits from constant value (faceabadf00df001 becomes f001)
>> include/linux/atomic/atomic-instrumented.h:1054:16: sparse: sparse: cast truncates bits from constant value (faceabadf00df001 becomes f00df001)
include/linux/atomic/atomic-instrumented.h:1061:16: sparse: sparse: cast truncates bits from constant value (faceabadf00df001 becomes 1)
include/linux/atomic/atomic-instrumented.h:1061:16: sparse: sparse: cast truncates bits from constant value (faceabadf00df001 becomes f001)
include/linux/atomic/atomic-instrumented.h:1061:16: sparse: sparse: cast truncates bits from constant value (faceabadf00df001 becomes f00df001)
include/linux/atomic/atomic-instrumented.h:1068:16: sparse: sparse: cast truncates bits from constant value (faceabadf00df001 becomes 1)
include/linux/atomic/atomic-instrumented.h:1068:16: sparse: sparse: cast truncates bits from constant value (faceabadf00df001 becomes f001)
include/linux/atomic/atomic-instrumented.h:1068:16: sparse: sparse: cast truncates bits from constant value (faceabadf00df001 becomes f00df001)
include/linux/atomic/atomic-instrumented.h:1075:16: sparse: sparse: cast truncates bits from constant value (faceabadf00df001 becomes 1)
include/linux/atomic/atomic-instrumented.h:1075:16: sparse: sparse: cast truncates bits from constant value (faceabadf00df001 becomes f001)
include/linux/atomic/atomic-instrumented.h:1075:16: sparse: sparse: cast truncates bits from constant value (faceabadf00df001 becomes f00df001)

vim +476 include/linux/atomic/atomic-instrumented.h

aa525d063851a9 include/asm-generic/atomic-instrumented.h Mark Rutland 2018-09-04 471
c020395b6634b7 include/asm-generic/atomic-instrumented.h Marco Elver 2019-11-26 472 static __always_inline int
aa525d063851a9 include/asm-generic/atomic-instrumented.h Mark Rutland 2018-09-04 473 atomic_cmpxchg(atomic_t *v, int old, int new)
aa525d063851a9 include/asm-generic/atomic-instrumented.h Mark Rutland 2018-09-04 474 {
3570a1bcf45e9a include/asm-generic/atomic-instrumented.h Marco Elver 2020-07-24 475 instrument_atomic_read_write(v, sizeof(*v));
aa525d063851a9 include/asm-generic/atomic-instrumented.h Mark Rutland 2018-09-04 @476 return arch_atomic_cmpxchg(v, old, new);
aa525d063851a9 include/asm-generic/atomic-instrumented.h Mark Rutland 2018-09-04 477 }
aa525d063851a9 include/asm-generic/atomic-instrumented.h Mark Rutland 2018-09-04 478

:::::: The code at line 476 was first introduced by commit
:::::: aa525d063851a98e020b827fdd1d7776ae652301 locking/atomics: Switch to generated instrumentation

:::::: TO: Mark Rutland <mark.rutland@xxxxxxx>
:::::: CC: Ingo Molnar <mingo@xxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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